Governor cut-off valve for engines.



No. 655,096. Patented July 3|, I900.

F. A. LARGE. GOVERNOR GUT-OFF VALVE FUB ENGINES.

W a. WW

(Application filed Oct. 27, 1899.)

(No Model.)

Noam n: s cc Pnoro-umo. WASHINGTON. u. c.

UNITED STATEs P TENT Orrros.

FRANK A. LARGE, on PITTSBU'RG, PENNSYLVANIA.

GOVERNOR CUT-OFF VALVE FOR ENQINE S.

SPEOIFICA'I'ION forming part of Letters Patent No. 655,096, dated July31, 1900. Application filed 001:01961'2'7, 1899. Serial No. 734,916. (Nomodel.)

To all whom it may concern:

Be itknown that I, FRANK A. LARGE, a resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful'lmprovement in Governor Out-Off Valves for Steam-Engines; and Ido hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to governor cut-off valves for steam-engines, andhas special reference to a self-contained governor for rotarysteam-engines. Y

The object of my invention is to provide a variable length to theopening in the valve of the governor for the purpose of regulating thesupply of steam and the expansion thereof in the cylinder orpiston-chamber of the engine by a simple and compact device.

My invention consists, generally stated, in the novel arrangement,construction, and combination of parts, as hereinafter more specificallyset forth and described, and'particularly pointed out in the claims. 1 i

To enable others skilled in the art to which my invention appertains toconstruct and use my improved governor, I will describe the same morefully, referring to the accompanying drawings, in which Figure 1represents a sectional view of the steam-chest of a rotary engine,showing my improved governor, applied, thereto.- Fig 2. is a plan orface ,view of the governor, looking in the direction of the arrow shownin Fig. 1 and showing the same removed from the steam-chest of theengine, andFig. 3 is alike view looking at the same side of the same andshowing the face-plate thereof removed.

Like numerals herein indicate like parts in each of the figures of thedrawings.

My improved governor is illustrated as ap-.

plied to a rotary engine, such as shown and.

described in an application for United States Letters Patent filed byIsaac V. Large on the 2d day of July, AD. 1898, Serial No. 685,008. Aportion of such rotary engine is shown at 1, which has a cylinder orpiston-chamber 2 therein, through which passes the main shaft 3, and a,steam-chest 4 is formed on one side of the piston-chamber 2, throughwhich said shaft 3 passes and which communicates with saidpiston-chamber 2 by the steam-port 5. Fitting around the shaft 3, withinthe steamchest 4, is the valve 6, whichis formed of the circular casting7, having the face-plate '7 secured thereon,which is adapted to fitagainst the inner wall 4 of said steam-chest 4 and form:a steamtightconnection therewith. The face-plate 7 is provided with an annularrecess 7 which is adapted to form a steamspace 7 between the face-plate7f and the inner wall 4 of the steam-chest 4. Around the periphery 8 ofsaid circular valver'oasting 7 is the loose, ring 8, which is providedwith a segmental opening or slot 9 therein, which slot 9 opens into thesteam-chest 4 on one side of the loose ring 8, so leaving said slot 9entirely open on the periphery of said loose ring 8 or on a radial linefrom center of shaft 3. The valve-casting 7 of the valve 6 fits looselyaround the shaft 3, but gets its motion and is held in place through apin 11, secured on said shaft 3, engaging a segmental slot 12,

formed in the bore 10 of the valve-casting 7.

j The valve-casting 7 is formed hollow, as at 13, having placed thereina segmental pinion 14, which is mounted on a stud 15,secured within thecasting 7, and is adapted to mesh with an internal segmental gear-face16, formed on the inner. face 17 of the loose ring 8 around 3 the outerface 8, of the valve-casting 7. Piv? oted at one end 18' to a link 18,which is piv-v oted at19 to the body portion 14' of the segmental pinion14, is thespiral or leaf spring 19, the opposite end of which is adaptedto be secured or bear against a collar 20 on the 'valvercasting 7, andthis collar 20 has a lug or flange 21,'whicl1' fits within the slot 9 ofthe loose ring 8. A centrifugal weight 23, having a recess 24 thereinfor fitting around the shaft 3, is connected to and formed as part ofthe A body 14' of the pinion 14, and the outside face 25 of said weight23 corresponds to the same radius as the inner face of the collar 20 inthe casting 7.

The use and operation of my improved governor for steam-engines is asfollows: Steam being supplied to the steam-chest 4 in any desired mannerwill actv on. said valve, 6, and when the slot 9 is oppositethesteam-port 5, leading from the steam chest 4 to the pistonchamber 2, thesteam willfiow or pass through the port 5 during the fraction of therevolution of the valve 6 equal to the length of the slot 9. As thesteam-port 5 is at right angles loo slot 9 is passingacross the face ofthe port 5.

As the shaft 3'is thus revolved by the entrance of steam into thepiston-chamber 2 from the steam-chest' t' through the port 5, the, valve6, looselysurrounding said shaft 3, is made to operate therefrom bymeans of the pin 11, engaging the slot 12 in the casting 7i "of saidvalve, and such slot 12 is of sufficient length to provide for thedifferent positions of the valve 6 when the engine is reversed. When anabnormal high speed of the engine is attained, the centrifugal forcegenerated from the revolution of the shaft '3 will act to throw out theweight 24 on the pinion l ifrom the center or axis of the pinion 14 andshaft 3, so overcoming the tension on the spring 19, pivot-allyconnected to the pinion 14 and link 18,and causing the loose ring 8 tomove around within the piston-chamber 2 by reason of said 7'segmental'gear-face 16 on the internal face on the casting? within thesteam-chests inanopposite direction from that of the piston 17 of thering 8 being in mesh with the se mental pinion 14. This reverse movementofthe loose ring'S will cause the closing up or shortening of thesteam-slot 9 in the ring 8 of the'va'lve 6 by means of the lug or flange21 onthe'collar 20, whichtravels withinsaid slot; 9,1 thereby cuttingoff the steam from the steam-chest 4 to the piston-chamber'2 through theslot 9 and port 5 at an earlier point in the revolution of the piston inthe chamber 2.- When the speed of the engine drops below normal, theconditions are exactly reversed, an'd'the falling or dropping of theweight 24; by reason of the tension on the spring 19 beinggreater thanthe centrifugal force of said i weight 24c, will increase the length ofthe slot 9in'the ring 8 from the flange 21 on the collar 20, caused bythe reverse movement of the said'ring' 8, through the medium of the pinion14 engaging the gear-face 16 on said ring 8 :andthe weight 24 andspring 19 being connect edito said pinion 14. The steam-space '7 betweentheface-plate 7 and the inner wall 4 of thesteam-chest 4 acts as acushion for the steam therein, which passes from the steam-chest 4around the shaft 3 and so acts to balancethevalve 6. g

"It "will thus be seen that my improved gov-' ernorfor steam-engines ischeap and simple in its construction and operation, and by its use thesteam from the steam-chest of the engine can be so regulated or suppliedto the cylinderor piston-chamber of the enginefrom the'valve of thegovernor as to insure the runningoftheengine at the normal speed req-uired. The device is efiective and practical in its operation andcontains veryfew parts','-so'insuring-its being less liable to get' outof order and allowing such partstobe made strong and durable. v

ton-chamber.

steam and the expansion thereof in ;inder or piston-chamber.

. cylinder or piston-chamber.

Various modifications in the construction and design of the variousparts of my improved governor may be resorted to without departing fromthe spirit of the invention or sacrificing any of its advantages.

What I claim as my invention, and desire tosecure" by Letters Patent, is

1. In governors for steam-engines, the combination with a steam-chesthaving a supplyport leading therefrom to the cylinder or piston-chamberof the engine, a shaft, passing through said-steam-chest and cylinder orpiston :ehamber, and .a circular valve loosely mounted around saidshaftwithin the steamchest for regulating the supply of steam and theexpansion thereof in the cylinder or pis- 2. In governorsforstean1'-engin'es,the com bination with a steam-chest havingasupplyport leading therefrom to the cylinder or piston-chamber of theengine, a shaft passing mounted around saidshaft within thesteamchestand provided with a, segmental opening or slot therein for regulatingthe supply of t-he 1 3. In governors for steam-engines, the combinationwith a steam-chest having a supplyport leading therefrom to-the cylinderor pisston-chamber of the engine, a shaft passing through saidsteam-chest and cylinder or piston-chamber, a valve castin g or collarloosely .mounted around said shaft and within said isteam-chest, and aloose ring fitting around 1 said casting or collar having a segmentalopening or slot therein for regulating the-supply of'the steam and theexpansion thereof inthe 4. In governorsfor steam-engines, thecombination with a steam-chest having a supplyport leading therefrom tothe cylinder or piston-chamber of the engine, a shaft passingthrough-said steam-chest and cylinder or piston-chamber, a valve castingor collar loosely mounted around said shaft and within said steam-chest,a loose ring fitting aroundsaid casting or collar having a segmentalopening or slot therein for regulatin g -Su p y of steam and theexpansion thereof in the cylinder or piston-chamber, andmechanismconnected to said casting or collar and loose ring for varyingthe size of the segmental opening or slot in the loose ring-according tothe speed i of the engine.

'5. In governors for steam-engines, the combination with asteam-chest'having a supplyport leading therefrom to the cylinder orpiston-chamber of the engine, a shaft" passing through said steam-chest,and cylinder or piston-chamber, 'a valve casting or collar looselymounted around said shaft and within the steam-chest, a loose ringfitting around said casting or collar having a segmental opening or slottherein forregulating the supply of steam and the expansion thereof inthe cyl- ICC inder or piston-chamber, a flange or lug on said casting orcollar extending across the se mental opening or slot in the loose ring,and mechanism connected to said casting or collar and loose ring forvarying the size of the segmental opening or slot in the loose ring bythe flange or lug on casting or collar.

6. In governors for steam-engines, the combination with a steam-chesthaving a supplyport leading therefrom to the cylinder or piston-chamberof the engine, a shaft passing through said steam-chest and cylinder orpiston-chamber, a valve casting or collar loosely mounted around said,shaft and within the steam-chest, a loose ring fitting around saidcasting or collar having asegmental opening or slot therein forregulating the supply of steam andthe expansion thereof in the cylinderor piston-chamber, a flange or lug on said casting or collar extendingacross the opening or slot in the loose ring, and a pinion on saidcasting or collar adapted to engage with theloose ring for varying thesize of the opening or slot in the said loose ring by the flange or lugon the casting or collar.

7. In governors forsteam-engines, the combination with a steam-chesthaving a supply-- port leading therefrom to the cylinder orpiston-chamber of the engine, a shaft passing through said steam-chestand cylinder or piston-chamber, a valve casting or collar looselymounted around said shaft and within the. steam-chest, a loose ringfitting around said casting or collar having a segmental opening or slotthereon for regulating the supply-of steam and the expansion thereof inthe cylinder or piston-chamber, a flange orlug on said casting or collarextending across the opening I or slot in the loose ring, a pinion onsaid casting or collar adapted to engage with the loose ring to vary thesize of the opening or slot in said loose ring by the flange or lug onthe casting or collar, said pinion having a Weighted arm connectedthereto, and a spring pivotally connected to said Weighted pinion and tothe casting or collar.

8. In governors for steam-engines, the combination with a steam-chesthaving a supplyport leading therefrom to the cylinder of the engine, ashaft passing through said steamchest and cylinder, a circular valveloosely mounted around said shaft within the steamchest for regulatingthe supply of steam and the expansion thereof inthe cylinder, and acushioning steam-space between the valve and wall of the steam-chest forbalancing said valve.

9. In governors for steam-engines, the combination with a steam-chesthaving a supplyport leading therefrom to the cylinder of the engine, ashaft passing through said steamchest and cylinder, a circular valveloosely mounted around said shaft within the steam chest for regulatingthe supply of steam and the expansion thereof in the cylinder, and aplate secured to said valve having a recess therein adapted to form asteam-space between the plate and Wall of the steam-chest for balancingsaid valve.

In testimony whereof I, the said FRANK A. LARGE, have hereunto set myhand.

FRANK A. LARGE.

Witnesses:

J. N. CooKE, JAMES L. WEHN.

